You stirred up sediment in the pipe while you were working and also if the water was turned off for that branch, the inrush of water when you turn it back on can stir up sediment.
Let it run for several minutes and it should clear up.
OT: When the water company or city flushes the water mains or when the fire department fights a fire, sediment all through the water mains will be stirred up and not all of it gets flushed out the hydrant. People up and down the block can get brown water for an hour or so
Tornado victims: Do not rush to rebuild. Take your time and look for and get a good contractor. Or consider selling the property and moving to a home that is ready to live in.